CN204187000U - A kind of lightning class groove end surface mechanical sealing structure - Google Patents
A kind of lightning class groove end surface mechanical sealing structure Download PDFInfo
- Publication number
- CN204187000U CN204187000U CN201420504435.5U CN201420504435U CN204187000U CN 204187000 U CN204187000 U CN 204187000U CN 201420504435 U CN201420504435 U CN 201420504435U CN 204187000 U CN204187000 U CN 204187000U
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- Prior art keywords
- guiding gutter
- groove
- face
- lightning class
- lightning
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- 238000007789 sealing Methods 0.000 title claims abstract description 36
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 33
- 238000009827 uniform distribution Methods 0.000 claims abstract description 4
- 230000007423 decrease Effects 0.000 claims description 7
- 238000012856 packing Methods 0.000 claims description 3
- 230000003068 static effect Effects 0.000 claims description 3
- 239000012530 fluid Substances 0.000 abstract description 14
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 10
- 238000010586 diagram Methods 0.000 description 7
- 239000003082 abrasive agent Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
Landscapes
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
A kind of lightning class groove end surface mechanical sealing structure, comprises the rotating ring of mechanical seal, stationary ring, and in rotating ring and stationary ring, the end face of at least one seal ring is provided with multiple lightning class groove along end face circumference uniform distribution, and lightning class slot is in end face high pressure side and upstream; Each lightning class groove comprises at least one quadrilateral guiding gutter, at least one little quadrilateral connecting groove and a quadrilateral or triangle stern notch, each lightning class groove is that guiding gutter and connecting groove are alternately distributed from upstream side successively to downstream side, end face downstream side guiding gutter is positioned at upstream side guiding gutter windward side, connected by connecting groove, stern notch is positioned at lightning class groove end, is connected with guiding gutter by connecting groove; Form sealing weir along end face circumference unslotted region between lightning class groove, lightning class groove downstream position is provided with a continuous circular shape sealing dam.The utility model beneficial effect is: be formed radially multiple zone of high pressure along end face, is separated by end face and forms stable fluid film, reduces end-face friction degree, reduces leakage rate, life-saving.
Description
Technical field
The utility model relates to a kind of lightning class groove end surface mechanical sealing structure, is specially adapted to the axle head liquid sealing device of the rotary fluid machines such as various compressor, pump and still stirrer.
Background technique
Mechanical seal is the Main Means preventing rotary type fluid machine axle head from leaking.Utilize the wear-resisting effect raising wear resistance of seal face of the anti-attrition of surperficial micro-texture and the surface texture technology in working life to obtain in recent years to develop faster.Etsion I at first model utility a kind of many (micro-) hole end surface sealing applications in pump class I liquid I shaft end seal device.Have this type of patent multinomial both at home and abroad at present, such as 01102213.2 " spiral groove end sealer capable of being rotated in both directions " and 200610049841.7 " wear-resistant mechanical sealing structure on end face ", but because the hydrodynamic effect of Surface Texture designed in current patent is limited, the bearing capacity of mechanical seal fluid film or end face is made to keep non-contacting limited in one's ability, the contact wear of easy generation end face, counteract the anti-attrition advantage of Surface Texture to a great extent, cause start and stop weak effect, end wear and working life short.
Summary of the invention
In order to the bearing capacity overcoming hydrodynamic effect and the fluid film sealed in prior art is limited, the shortcoming of start and stop weak effect, the utility model provides a kind of degree of wear that can reduce seal face, strengthen the anti-attrition advantage of Surface Texture, reduce leakage rate, the lightning class groove end surface mechanical sealing structure of prolonged mechanical sealing.
A kind of lightning class groove end surface mechanical sealing structure described in the utility model, comprise the rotating ring of mechanical seal, stationary ring, it is characterized in that: in described rotating ring and stationary ring, the end face of at least one seal ring is provided with multiple lightning class groove along end face circumference uniform distribution, and described lightning class slot is in end face high pressure side and upstream; Each described lightning class groove comprises at least one quadrilateral guiding gutter, at least one little quadrilateral connecting groove and a quadrilateral or triangle stern notch, each described lightning class groove arrangement is alternately distributed from upstream side to downstream side successively for guiding gutter and connecting groove, the guiding gutter in end face downstream side is positioned at the windward side of upstream side guiding gutter, connected by connecting groove, and stern notch is positioned at the end of lightning class groove, is connected with guiding gutter by connecting groove; Each described lightning class groove all along end face arranged radially, and is positioned at the stern notch at end and the nearest of the end face center of circle; Described guiding gutter, connecting groove and stern notch have two sidewall lines and two circular arc lines, the circular arc line in described guiding gutter, connecting groove and stern notch upstream side and downstream side is for being concentrically ringed circular arc line with internal-and external diameter profile line, and the circular arc line length in described stern notch downstream side is more than or equal to zero; Form along end face circumference unslotted region the sealing weir being used for current limliting and static seal between described lightning class groove, the position in described lightning class groove downstream is provided with a continuous print ring packing dam.
Further, the sidewall molded line of described guiding gutter, connecting groove and stern notch is helix or circular arc line or straight line.
Further, the central angle θ that the maximum circumferential arc length of described lightning class groove is corresponding
1the central angle θ corresponding with the maximum circumferential arc length on adjacent seals weir
2ratio θ
1/ θ
2=0.5 ~ 2, preferable range is 0.8 ~ 1.5.
Further, degree of depth h=2 ~ 50 μm of described guiding gutter, connecting groove and stern notch, preferable range is 5 ~ 30 μm; Described guiding gutter and the degree of depth of stern notch is radially equal or successively decrease from end face upstream to downstream.
Further, the radial width l of described guiding gutter
dd=0.5 ~ 2mm, preferable range is 0.8 ~ 1.5mm; The maximum circumferential arc length l of described guiding gutter
dc=1 ~ 4mm and radially reducing gradually from upstream side to downstream side, preferable range is 2 ~ 3mm.
Further, the radial width l of described connecting groove
ld=0.1 ~ 0.4mm, preferable range is 0.1 ~ 0.3mm; The maximum circumferential arc length l of described connecting groove
lc=0.2 ~ 0.5mm, preferable range is 0.25 ~ 0.4mm; Described connecting groove windward side and the leeward side degree of depth radially with the deep equality of be connected guiding gutter.
Further, described stern notch radial width l
wd=0.2 ~ 1mm, preferable range is 0.3 ~ 0.8mm; The maximum circumferential arc length l of described stern notch
wc=0.4 ~ 1mm, preferable range is 0.5 ~ 0.8mm.
Further, the length of described stern notch downstream side molded line is more than or equal to zero.
Further, the span of the number n of described guiding gutter is: 2≤n≤30, and preferable range is: 8≤n≤20.
Further, the feed liquor angle θ of upstream side guiding gutter
3=10 ~ 70 °, preferable range is 10 ° ~ 45 °.
Further, the area of the guiding gutter described in n is equal or successively decreases to downstream from end face upstream.
A kind of lightning class groove mechanical seal face structure described in the utility model is utilized to be only applicable to one direction rotating machinery.
Working principle of the present utility model: lightning class groove seal face start up period can enter guiding gutter by the sealing medium drawn fast in Seal cage, zone of high pressure is produced at guiding gutter end, seal face is separated and forms stable fluid film, the sharp wear start up period of avoiding.Lightning class groove has multiple guiding gutter, can radially form multiple zone of high pressure, enhance the dynamic pressure effect of fluid film, increases unseal power, ensures the stability that sealing runs.Be connected by connecting groove between guiding gutter with guiding gutter, by connecting groove, the high-pressure medium of upstream introduced the guiding gutter in downstream.Guiding gutter can receive the abrasive material of the larger particles entering seal face, avoids abrasive material to the wearing and tearing of seal face.Simultaneously, the guiding gutter being positioned at upstream can store a large amount of sealing mediums, when Seal cage medium is supplied unstable or not enough, guiding gutter for downstream provides sufficient sealing medium, ensure enough fluid film rigidity, improve the stability that sealing runs, avoid direct contact and the sharp wear of seal face in running.The stern notch being positioned at downstream then plays the effect stored upstream leaking medium, avoids a large amount of fluids to leak, forms zone of high pressure simultaneously at stern notch end.In addition, the sealing dam being arranged in downstream can play at running and stopping phase the effect hindering fluid to leak.
The beneficial effects of the utility model are:
1. lightning class groove seal face start up period can enter guiding gutter by the sealing medium drawn fast in Seal cage, guiding gutter end produce zone of high pressure, seal face is separated and forms stable fluid film, the sharp wear start up period of avoiding;
2. lightning class groove has multiple guiding gutter, can radially form multiple zone of high pressure, enhance the dynamic pressure effect of fluid film, increases unseal power, ensures the stability that sealing runs;
3. guiding gutter can receive the abrasive material of the larger particles entering seal face, avoids abrasive material to the wearing and tearing of seal face;
4. the guiding gutter being positioned at upstream can store a large amount of sealing mediums, when Seal cage medium is supplied unstable or not enough, guiding gutter for downstream provides abundant sealing medium, ensure enough fluid film rigidity, improve the stability that sealing runs, avoid direct contact and the sharp wear of seal face in running;
5. the stern notch being positioned at downstream then plays the effect stored upstream leaking medium, avoids a large amount of fluids to leak, forms zone of high pressure simultaneously at stern notch end.
Accompanying drawing explanation
Fig. 1 is the end-face structure schematic diagram of the utility model embodiment 1.
Fig. 2 is the lightning class groove structural representation of the utility model embodiment 1.
Fig. 3 is the guide trough structure schematic diagram of the utility model embodiment 1.
Fig. 4 is the connecting groove structure schematic diagram of the utility model embodiment 1.
Fig. 5 is the tail-groove structure schematic diagram of the utility model embodiment 1.
Fig. 6 is the end-face structure schematic diagram (wherein A, C represent downstream side, and B, D represent upstream side) of the utility model embodiment 2.
Fig. 7 is guiding gutter and the stern notch change in depth schematic diagram of the utility model embodiment 3.
Fig. 8 is the end-face structure schematic diagram of the utility model embodiment 4.
Embodiment
The utility model is further illustrated below in conjunction with accompanying drawing
With reference to accompanying drawing:
Embodiment 1 is with reference to Fig. 1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5, a kind of lightning class groove mechanical seal face structure, comprise the rotating ring of mechanical seal, stationary ring, in described rotating ring and stationary ring, the end face of at least one seal ring is provided with multiple lightning class groove along end face circumference uniform distribution, and described lightning class slot is in end face high pressure side and upstream; Each described lightning class groove comprises at least one quadrilateral guiding gutter 1, at least one little quadrilateral connecting groove 2 and a quadrilateral or leg-of-mutton stern notch 3, each described lightning class groove arrangement is alternately distributed from upstream side to downstream side successively for guiding gutter 1 and connecting groove 2, the guiding gutter in end face downstream side is positioned at the windward side of upstream side guiding gutter, connected by connecting groove 2, and stern notch 3 is positioned at the end of lightning class groove, be connected with guiding gutter 1 by connecting groove 2; Each described lightning class groove all along end face arranged radially, and is positioned at the stern notch at end and the nearest of the end face center of circle; Described guiding gutter 1, connecting groove 2 and stern notch 3 have two sidewall lines (11,12,21,22,31,32) and two circular arc lines (13,14,23,24,33,34), described guiding gutter 1, connecting groove 2 and stern notch 3 upstream side circular arc line (13,23,33) and downstream side circular arc line (14,24,34) are for being concentrically ringed circular arc line with internal-and external diameter profile line, and the length of described stern notch 3 downstream side circular arc line 34 is for being greater than zero; Form along end face circumference unslotted region the sealing weir 4 being used for current limliting and static seal between described lightning class groove, the position in described lightning class groove downstream is provided with a continuous print ring packing dam 5.
The sidewall molded line (11,12,21,22,31,32) of described guiding gutter 1, connecting groove 2 and stern notch 3 is straight line.
The central angle θ that the maximum circumferential arc length of described lightning class groove is corresponding
1the central angle θ corresponding with the maximum circumferential arc length on adjacent seals weir
2ratio θ
1/ θ
2=0.5 ~ 2, preferable range is 0.8 ~ 1.5.
Degree of depth h=2 ~ 50 μm of described guiding gutter 1, connecting groove 2 and stern notch 3, preferable range is 5 ~ 30 μm; Described guiding gutter 1 is radially equal with the degree of depth of stern notch 3.
The radial width l of described guiding gutter 1
dd=0.5 ~ 2mm, preferable range is 0.8 ~ 1.5mm; The maximum circumferential arc length l of described guiding gutter 1
dc=1 ~ 4mm and radially reducing gradually from upstream side to downstream side, preferable range is 2 ~ 3mm.
The radial width l of described connecting groove 2
ld=0.1 ~ 0.4mm, preferable range is 0.1 ~ 0.3mm; The maximum circumferential arc length l of described connecting groove 2
lc=0.2 ~ 0.5mm, preferable range is 0.25 ~ 0.4mm; Described connecting groove windward side 22 degree of depth and leeward side 21 degree of depth radially with the deep equality of be connected guiding gutter.
Described stern notch 3 radial width l
wd=0.2 ~ 1mm, preferable range is 0.3 ~ 0.8mm; The maximum circumferential arc length l of described stern notch 3
wc=0.4 ~ 1mm, preferable range is 0.5 ~ 0.8mm.
The span of the number n of described guiding gutter 1 is: 2≤n≤30, and preferable range is: 8≤
n≤ 20.
The feed liquor angle θ of described upstream side guiding gutter 1
3=10 ~ 70 °, preferable range is 10 ° ~ 45 °.
The area of n described guiding gutter 1 is equal.
Embodiment 2
With reference to Fig. 6, the difference of the present embodiment and embodiment one is, the sidewall molded line (11,12,21,22,31,32) of described guiding gutter 1, connecting groove 2 and stern notch 3 is helix (6 and 7) or circular arc line (8 and 9), the length of described stern notch 3 downstream side molded line 34 equals zero (6 and 9) or is greater than zero (7 and 8), and all the other structures are identical with embodiment 1 with mode of execution.
Embodiment 3
With reference to Fig. 7, the difference of the present embodiment and embodiment 1 is, described guiding gutter 1 and the degree of depth of stern notch 3 are successively decreased from end face upstream gradually to downstream, steppedly successively decreases or straight-line decline, and all the other structures are identical with embodiment 1 with mode of execution.
Embodiment four
With reference to Fig. 8, the difference of the present embodiment and embodiment 1 is, the area of n described guiding gutter 1 successively decreases from end face upstream gradually to downstream, and all the other structures are identical with embodiment 1 with mode of execution.
Content described in this specification embodiment is only enumerating the way of realization that model utility is conceived; protection domain of the present utility model should not be regarded as being only limitted to the concrete form that embodiment states, protection domain of the present utility model also comprises those skilled in the art and conceives the equivalent technologies means that can expect according to the utility model.
Claims (10)
1. a lightning class groove end surface mechanical sealing structure, comprise the rotating ring of mechanical seal, stationary ring, it is characterized in that: in described rotating ring and stationary ring, the end face of at least one seal ring is provided with multiple lightning class groove along end face circumference uniform distribution, and described lightning class slot is in end face high pressure side and upstream; Each described lightning class groove comprises at least one quadrilateral guiding gutter, at least one little quadrilateral connecting groove and a quadrilateral or leg-of-mutton stern notch, each described lightning type groove structure is that guiding gutter and connecting groove are alternately distributed from upstream side successively to downstream side, the guiding gutter in end face downstream side is positioned at the windward side of upstream side guiding gutter, and be connected by connecting groove, and stern notch is positioned at the end of lightning class groove, is connected with guiding gutter by connecting groove; Each described lightning class groove all along end face arranged radially, and is positioned at the stern notch at end and the nearest of the end face center of circle; Described guiding gutter, connecting groove and stern notch have two sidewall lines and two circular arc lines, the circular arc line in described guiding gutter, connecting groove and stern notch upstream side and downstream side is for being concentrically ringed circular arc line with internal-and external diameter profile line, and the circular arc line length in described stern notch downstream side is more than or equal to zero; Form along end face circumference unslotted region the sealing weir being used for current limliting and static seal between described lightning class groove, the position in described lightning class groove downstream is provided with a continuous print ring packing dam.
2. a kind of lightning class groove end surface mechanical sealing structure as claimed in claim 1, is characterized in that: the sidewall molded line of described guiding gutter, connecting groove and stern notch is helix or circular arc line or straight line.
3. a kind of lightning class groove end surface mechanical sealing structure as claimed in claim 1, is characterized in that: the central angle θ that the maximum circumferential arc length of described lightning class groove is corresponding
1the central angle θ corresponding with the maximum circumferential arc length on adjacent seals weir
2ratio θ
1/ θ
2=0.5 ~ 2.
4. a kind of lightning class groove end surface mechanical sealing structure as claimed in claim 2, is characterized in that: degree of depth h=2 ~ 50 μm of described guiding gutter, connecting groove and stern notch; Described guiding gutter and the degree of depth of stern notch is radially equal or successively decrease from end face upstream to downstream.
5. a kind of lightning class groove end surface mechanical sealing structure as claimed in claim 4, is characterized in that: the radial width l of described guiding gutter
dd=0.5 ~ 2mm; The maximum circumferential arc length l of described guiding gutter
dc=1 ~ 4mm and radially reducing gradually from upstream side to downstream side.
6. a kind of lightning class groove end surface mechanical sealing structure as claimed in claim 4, is characterized in that: the radial width l of described connecting groove
ld=0.1 ~ 0.4mm; The maximum circumferential arc length l of described connecting groove
lc=0.2 ~ 0.5mm; Described connecting groove windward side and the leeward side degree of depth radially with the deep equality of be connected guiding gutter.
7. a kind of lightning class groove end surface mechanical sealing structure as claimed in claim 4, is characterized in that: described stern notch radial width l
wd=0.2 ~ 1mm; The maximum circumferential arc length l of described stern notch
wc=0.4 ~ 1mm.
8. a kind of lightning class groove end surface mechanical sealing structure as claimed in claim 5, is characterized in that: the span of the number n of described guiding gutter is: 2≤n≤30.
9. a kind of lightning class groove end surface mechanical sealing structure as claimed in claim 8, is characterized in that: the feed liquor angle θ of upstream side guiding gutter
3=10 ~ 70 °.
10. a kind of lightning class groove end surface mechanical sealing structure as claimed in claim 8, is characterized in that: the area of the guiding gutter described in n is equal or successively decreases to downstream from end face upstream.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420504435.5U CN204187000U (en) | 2014-09-03 | 2014-09-03 | A kind of lightning class groove end surface mechanical sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420504435.5U CN204187000U (en) | 2014-09-03 | 2014-09-03 | A kind of lightning class groove end surface mechanical sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204187000U true CN204187000U (en) | 2015-03-04 |
Family
ID=52619003
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420504435.5U Withdrawn - After Issue CN204187000U (en) | 2014-09-03 | 2014-09-03 | A kind of lightning class groove end surface mechanical sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204187000U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104235371A (en) * | 2014-09-03 | 2014-12-24 | 浙江工业大学 | Mechanical sealing structure for end face of lightning groove |
| CN104896101A (en) * | 2015-05-26 | 2015-09-09 | 浙江工业大学 | End face gas film sealing structure for bump-type foil |
-
2014
- 2014-09-03 CN CN201420504435.5U patent/CN204187000U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104235371A (en) * | 2014-09-03 | 2014-12-24 | 浙江工业大学 | Mechanical sealing structure for end face of lightning groove |
| CN104235371B (en) * | 2014-09-03 | 2016-06-15 | 浙江工业大学 | A kind of lightning class groove end surface mechanical sealing structure |
| CN104896101A (en) * | 2015-05-26 | 2015-09-09 | 浙江工业大学 | End face gas film sealing structure for bump-type foil |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150304 Effective date of abandoning: 20160615 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20150304 Effective date of abandoning: 20160615 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |